Professor Campbell shows some chemical reactions and discusses them in terms of the concepts presented in the CHEM Study film. These concepts include collisions, orientation of the colliding molecules, and activation energy. The effect of concentration on reaction rate and the idea of the rate-determining step are demonstrated using the oxygen-dextrose-methylene blue system. The role of activation energy in breaking or weakening bonds of the reacting molecules is related to the reaction 2H2 + 02 —> 2H20.
Audio/Visual sound, color